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Experimental demonstration of a squeezing-enhanced power-recycled michelson interferometer for gravitational wave
Kirk McKenzie1, Daniel A Shaddock, David E McClelland
1Gravitational Wave Research Facility, Department of Physics, Faculty of Science, Australian National University, ACT 0200, Australia.
Abstract:
Interferometric gravitational wave detectors are expected to be limited by shot noise at some frequencies. We experimentally demonstrate that a power recycled Michelson with squeezed light injected into the dark port can overcome this limit. An improvement in the signal-to-noise ratio of 2.3 dB is measured and locked stably for long periods of time. The configuration, control, and signal readout of our experiment are compatible with current gravitational wave detector designs. We consider the application of our system to long baseline interferometer designs such as LIGO.